Improvement in pumps



J. A. SIN CLAIR.

Improvement in Pumps.

Patented Sep.17, 1872.

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UNITED STATES PATENT OEETCE.

JAMES A. srNoLAIE, 0E wooDsEIELD, onro, AssreNoE To EiMsELE' AND WARREN EoLLIsTEE, 0E sAME PLAGE.

IMPROVEMENT IN PUMPS.

Specification forming part of Letters Patent No. 131,469, dated September 17, 1872.

' To all whom it may concern:

Be it known that I, JAMES A. SINCLAIR, of Woodseld, in the county of Monroe and State of Ohio, have invented an Improved Pump, of which the following is a specication: j

The invention will rst be fully described and then clearly pointed out in the claim,

Figure l is a vertical, central, and sectional elevation of my improved pump. Figs. 2 and 3 are detail views of the valve-plates.

A in the drawing represents a case or shell, having body a and bottom a', of iron, which are cast in a single piece. B is an inner cylinder, open' at both ends, and made of glass or metal, preferably in one or more longitudinal sections, to allow for expansion and contraction. C is an intermediate cylinder, formed of cement. The cement forms a water-tight joint between the shell A and inner cylinder B, while its elasticity admits of the said contraction and expansion without producing a leak. By this construction I avoid all seams and joints, and form a pump-cylinder which is not comparatively but absolutely water-tight. D is the piston-rod, which is rigidly attached to a double collar, d d1, the part dl slidingupon the guide-tube d2. Eis apipe, extendingfrom cylinder A B G, and enlarged at the end to receive upwardly-opening check-valve e. F is the piston, which is provided with a cast-metal and apertured plate, f, and aleather valve, f' which may be adjusted with respect to one another. Y

It will thus be perceived that the inner cylinder, being in sections, can readily expand,

while the cement forms a water-tight inclosinder adjacent thereto, and an outer cast-iron cylinder in one piece, all applied together as described.

JAMES A. SINGLAIR.

Witnesses S. L. MooNEv, J. D. MAYs. 

